Options of a PushSubscription
You can now access the options used when subscribing a user to push.
Web Push Interoperability Wins
Web push has had a few updates in recent versions of Chrome. GCM now supports the web push protocol and if you use VAPID you won't need to sign up for a Google Developer Project and you'll be given an FCM endpoint.
Web Push Payload Encryption
Web Push now supports payloads! Find out how to take advantage of this powerful new feature.
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Notifying you of Changes to Notifications
2 new API's have been added in Chrome 44 which makes using Notifications with push easier to work with and customize.
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Push Notifications on the Open Web
Push Messaging and Notifications are Landing in Chrome 42.